What's wrong with my Honda accord?

I have a 1990 accord, I don't know much about the car. A week ago, I stopped to get gas. After I pumped up, I got back in and started it in neutral. But when I would try and put it into gear it wouldn't go. (My clutch is pushed in) if I push hard enough it will grind the gear. So, I turned the car off. I start the car in first gear and it'll run but as it's moving the clutch smells like it's burning. After about 2 hours of sitting in the parking lot. The car worked. I got it home. The next day it did the same thing. It's kinda random when it will work. Help please

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